Answer
Technically, no.
Work Step by Step
The K absorption edge marks a place where photons with energy at or above this level can excite an electron from the K shell into an empty state. These empty states are just a few eV below free-electron states, as explained on page 1394, so technically, the atom is not ionized.
However, given that these K absorption edge photons are some tens of thousands of eV in energy, the excited electrons may be considered to be free.
